EP2298540B1 - Zusammensetzungen zur Verwendung beim dreidimensionalen Modelldruck - Google Patents

Zusammensetzungen zur Verwendung beim dreidimensionalen Modelldruck Download PDF

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Publication number
EP2298540B1
EP2298540B1 EP10181366.5A EP10181366A EP2298540B1 EP 2298540 B1 EP2298540 B1 EP 2298540B1 EP 10181366 A EP10181366 A EP 10181366A EP 2298540 B1 EP2298540 B1 EP 2298540B1
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EP
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Prior art keywords
composition
interface material
water
reactive component
layers
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EP10181366.5A
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English (en)
French (fr)
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EP2298540A3 (de
EP2298540A2 (de
Inventor
Eduardo Napadensky
Hanan Gothait
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Stratasys Ltd
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Stratasys Ltd
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Priority claimed from EP06121497.9A external-priority patent/EP1741545B1/de
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Publication of EP2298540A3 publication Critical patent/EP2298540A3/de
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/006—Patterns of chemical products used for a specific purpose, e.g. pesticides, perfumes, adhesive patterns; use of microencapsulated material; Printing on smoking articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/40—Structures for supporting 3D objects during manufacture and intended to be sacrificed after completion thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y10/00—Processes of additive manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y70/00—Materials specially adapted for additive manufacturing
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
    • G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
    • G03F7/0037—Production of three-dimensional images
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
    • G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
    • G03F7/004—Photosensitive materials
    • G03F7/027—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds

Definitions

  • the present invention relates to three-dimensional (3-D) modeling in general and to methods and compositions for use in 3-D printing of complex structures in particular.
  • 3-D printing which works by building parts in layers, is a process used for the building up of 3-D models.
  • 3-D printing is relatively speedy and flexible, allowing for the production of prototype parts and tooling directly from a CAD model, for example.
  • 3-D printing enables the manufacturer to obtain a full 3-D model of any proposed product before tooling, thereby possibly substantially reducing the cost of tooling and leading to a better synchronization between design and manufacturing. A lower product cost and improved product quality can also be obtained.
  • U.S. Patent 6,658,314 describes a system and a method for printing complex 3-D models by using interface materials having different hardness or elasticity and mixing the interface material from each of the printing heads to control the hardness of the material forming the 3-D model.
  • the construction layers of the model are formed from interface material having a different (harder) modulus of elasticity than the material used to form the release (and support) layers, thereby allowing for the forming of complex shapes.
  • U.S. Patent Nos. 4,303,924 , 5,889,084 , and 5,270,368 discloses radiation curable compositions for jet-drop printing containing multifunctional ethylenically unsaturated material, monofunctional ethylenically unsaturated material, a reactive synergist, a dye colorant and an oil soluble salt
  • U.S. Patent No. 5,889,084 discloses a radiation curable ink composition for ink-jet printing which comprises a cationically photoreactive epoxy or vinyl ether monomer or oligomer, a cationic photo-initiator and a coloring agent.
  • U.S. Patent No. 5,270,368 discloses a UV curable ink composition for ink-jet printing comprising a resin formulation having at least two acrylate components, a photo-initiator and an organic carrier..
  • compositions disclosed in these references are formulated for use in ink-jet printing.
  • Compositions for ink-jet printing are formulated differently from compositions for building 3-D models, and thus have different properties. For example, high viscosity at room temperature is a desirable property for 3-D objects, and thus compositions for building 3-D models are designed to have a high viscosity at room temperature.
  • compositions for ink-jet printing are designed to have low viscosity at room temperature in order to function well in the printing process. None of the above-mentioned references disclose compositions that are especially formulated for 3-D printing. Radiation curable inks for 3-D objects are disclosed in U.S. Patent No. 5,705,316 . U.S.
  • 5,705,316 discloses compounds having at least one vinyl ether group, which also contain in the molecule at least one other functional group such as an epoxy or an acrylate group; compositions comprising these compounds; and methods of producing 3-D objects using these compositions.
  • the compounds of U.S. 5,705,316 are complex molecules that are not readily available and thus need to be especially synthesized, which incurs additional time and costs.
  • thermopolymer material adapted for use in thermal stereolithography is disclosed in U.S. Patent No. 5,855,836 .
  • the thermopolymer of U.S. 5,855,836 comprises a mixture of a low shrinkage polymer resin, a low viscosity material such as paraffin wax, at least one microcrystalline wax, a toughening polymer and a plasticizer. These wax-like materials are solid at room temperature.
  • the present invention relates to compositions according to claim 1 for use in the manufacture of 3 D objects and for use as support and/or release material in the manufacture of said 3-D objects.
  • the present invention relates to a
  • an interface material composition suitable for use in support layers for three-dimensional objects by a method of selective dispensing.
  • the composition comprises:
  • the composition has a first viscosity at room temperature, and a second viscosity compatible with ink-jet printers at a second temperature, wherein said second temperature is higher than room temperature;
  • composition is irradiated or cured resulting in a semi-solid form.
  • the composition further comprises a molecule having one or more vinyl ether substituents, a water miscible component that is, after curing, capable of swelling upon exposure to water or to an alkaline or acidic water solution, or a combination thereof.
  • the water miscible component is a (meth)acrylated urethane oligomer derivative of polyethylene glycol, a partially (meth)acrylated polyol oligomer, a (meth)acrylated oligomer having hydrophilic substituents, polyethylene glycol mono or di (meth)acrylated, or any combination thereof.
  • the non-reactive component is polyethylene glycol, methoxy polyethylene glycol, glycerol, ethoxylated polyol, or propylene glycol or any combination thereof.
  • the first viscosity of the composition is greater than 80 cps. In one embodiment, the first viscosity is between 80 and 300 cps. In another embodiment, the first viscosity is around 200 cps.
  • the second viscosity of the composition is lower than 20 cps at a second temperature, which is greater than 60°C. In another embodiment, the second viscosity is between 8 arid 15 cps at the second temperature, which is greater than 60°C. In another embodiment, the second viscosity is about 11 cps at a temperature around 85°C.
  • the second interface composition further comprising a component able to produce gas upon exposure to water or to an alkaline or acidic solution.
  • the component able to produce gas upon exposure to water or to an alkaline or acidic solution is sodium bicarbonate.
  • the present invention relates to compositions for use as a support and/release material in the manufacture of 3-D objects.
  • the present specification further relates to a method for the preparation of a 3-D object by 3-D printing, using the above-mentioned compositions, and to a 3-D object obtained by said method.
  • a composition for use in the manufacture of the 3-D objects comprises at least one reactive component, at least one photo-Initiator, at least one surface-active agent and at least one stabilizer.
  • the composition is formulated so as to be compatible for use with ink-jet printers and to have a viscosity at room temperature above 50 cps.
  • the composition for use as a support and/or second interface material in the manufacture of the 3-D objects comprises at least one non-reactive and low-toxicity component, at least one surface-active agent and at least one stabilizer.
  • the composition may further contain at least one reactive component and at least one photo-initiator
  • the composition is formulated so as to be compatible for use with ink-jet printers and to have a viscosity at room temperature above 50 cps.
  • compositions will be described in further detail below.
  • Fig 1 is an illustration of a 3-D printing system, generally designated 10, which includes one or more printing heads, referenced 12, and at least two dispensers generally referenced 14 and individually referenced 14a and 14b, containing interface materials, generally referenced 16 and individually referenced 16a and 16b, respectively.
  • Printing head 12 has a plurality of ink-jet type nozzles 18, through which interface materials 16a and 16b are jetted.
  • first dispenser 14a is connected to a first set of nozzles, referenced 18a
  • second dispenser 14b is connected to a second set of nozzles, referenced 18b.
  • first interface material 16a is jetted through nozzles 18a
  • second interface material 16b is jetted through nozzles 18b.
  • the 3-D printing system may comprise at least two printing heads. The first printing head is connected to first dispenser 14a and is used to jet first interface material 16a; and the second printing head is connected to second dispenser 14b is used to jet second interface material 16b.
  • the 3-D printing system 10 further includes a controller 20, a Computer Aided Design (CAD) system 22, curing unit 24, and optionally a positioning apparatus 26.
  • the controller 20 is coupled to the CAD system 22, curing unit 24, positioning apparatus 26, printing head 12 and each of the dispensers 14.
  • the 3-D object being produced (28) is built in layers, the depth of each layer being controllable by selectively adjusting the output from each of the ink-jet nozzles 18.
  • each dispenser contains interface material having a different hardness
  • the interface material being output from each of the dispensers different parts of the 3-D object having a different modulus of elasticity and a different strength can be produced.
  • the term “strength” is used as a relative term to Indicate the difference in modulus of elasticity among interface materials.
  • the strength of a material may be described by reference to its modulus of elasticity, which may be defined as: "the ratio of stress to its corresponding strain under given conditions of load, for materials that deform elastically, according to Hooke's law".
  • the first dispenser 14a contains a first interface material 16a, referred to hereinafter as the "first interface material”, and the second dispenser 14b contains a second interface material 16b, referred to hereinafter as the "second interface material”.
  • the first interface material has a different (harder) modulus of elasticity and a greater strength than the second interface material.
  • combining the first interface material and the second interface material forms a multiplicity of construction layers, which are defined as the layers constituting the 3-D object.
  • Multiplicity refers to a number which is one or greater.
  • first interface material and the second interface material forms a multiplicity of support layers, which are defined as the layers supporting the 3-D object, and not constituting the 3-D object.
  • first interface material and the second interface material forms a multiplicity of release layers, which are defined as the layers (not constituting the 3-D object) for separating the 3-D object layer from layers such as the support layers.
  • the release layers have a lower modulus of elasticity and a lower strength than the construction layers and the support layers.
  • the support layers are designed exactly as the construction layers, and thus have the same modulus of elasticity and the same strength as the construction layers.
  • the construction layers form a core, and the support layers look like the negative printing of the core.
  • the release layers are positioned between the construction layers and the support layers, and are used to separate the construction layers from the support layers.
  • the support layers have a lower modulus of elasticity and a lower strength than the construction layers.
  • the support layers may be separated from the construction layers by taking advantage of their weaker properties, as will be explained In detail below.
  • the support layers may be separated from the construction layers by positioning release layers between the construction layers and the support layers.
  • Fig 2 is a 3-D model of a wineglass, generally referenced 30.
  • This 3-D model is printed using the ink-jet type printing system of Fig 1 .
  • Combining the first interface material and the second interface material form a multiplicity of construction layers 32 which make up wine glass 30.
  • the construction layers 32 of wineglass 30 need to be supported externally, such as in the area referenced 34. Furthermore, an internal void, referenced 36, needs to be formed during printing. Thus a multiplicity of support layers 38, formed by combining the first interface material and the second interface material, are printed.
  • release layers 40 are positioned between construction layers 32 and support layers 38.
  • release layers 40 have a different (lower) modulus of elasticity than support layers 38 and construction layers 32.
  • release layers 40 can be used to separate support layers 38 from construction layers 32.
  • compositions according to claim 1 suitable for use as the the second interface material.
  • the second interface material of the present invention are especially designed and formulated for building a 3-D object using 3-D printing. Accordingly, the interface materials are designed to have increased viscosity at room temperature, which is defined as about 20-30C.
  • the second interface material has a viscosity greater than 80 cps at room temperature, more preferably between 80 and 300 cps. In a preferred embodiment, the second interface material have a viscosity of around 300 cps at room temperature,
  • the second interface material have a second viscosity compatible with ink-jet printing, at a second temperature which is higher than room temperature.
  • a composition compatible with ink-jet printing has low viscosity, preferably below 20 cps at the printing temperature, in order to function properly In the printing process.
  • the second interface material upon heating, has a viscosity below 20 cps at a second temperature higher than 60°C, enabling the construction of the 3-D object under heat.
  • the temperature typically used to build the 3-D model described in the present specification is higher than 60C, preferably about 85C.
  • the second interface materials has a viscosity of 8-15 cps at a temperature greater than 60C.
  • the second interface materials has a viscosity of 11 cps at a temperature of about 85C.
  • the second interface material is distinguished from prior art formulations designed for ink-jet printing, which have low viscosity at room temperature, the temperature at which the printing is conducted.
  • High viscosity at room temperature is a desirable property for 3-D objects, a feature that is lacking in the prior art formulations.
  • the second interface material is formulated to form a release layer to permit a manual easy cleaning of the 3-D model from its support.
  • the second interface material may be one of two different principle kinds: 1) a liquid material lacking any curable groups that remains liquid even after irradiation In one embodiment, the liquid is water miscible and is easily washed out by water; and 2) a solid or semi-solid material that is formulated as a very weak, curable material that, when cured, is capable of swelling in water or in alkaline or acidic water.
  • the second interface material swells and almost breaks upon exposure to water, with minimum manual work required, i.e. a semi-solid form material.
  • the second interface material is formulated so as to permit fast, easy and efficient removal of the support and release construction layers and cleaning of the 3-D model.
  • the second interface material according to claim 1 of the present invention comprises: at least one non-reactive and low toxicity compound; at least one surface-active agent; and at least one stabilizer.
  • the non-reactive component of the second interface material is a non-reactive and low toxicity compound, preferably a water miscible once.
  • non-reactive refers to compounds of the second interface composition that do not undergo a curing process, therefor remain in a liquid form after irradiation.
  • the non-reactive component is chosen to reduce the mechanical strength of the second interface material and/or enhance its water-swelling rate. High water diffusion rate is desirable in order to minimize the time needed for the water cleaning process of the 3-D model.
  • non-reactive components for the present invention are polyethylene glycol marketed by Aldrich under the trade name PEG 400, methoxypolyethylene glycol marketed by Aldrich under the trade name methoxycarbowax 500 and 1000, and propylene glycol.
  • Other examples are ethoxylated polyols and glycerol.
  • the second interface material further comprises at least one reactive component and at least one photo-initiator.
  • the second interface material is formulated as a curable composition that is capable of solidifying upon radiation exposure.
  • the reactive components may be similar to those used in the first interface material, but may be chosen specifically to give a hydrophillic cured resin, with very weak mechanical properties. Thus, upon curing, a solid composition is formed that is very weak and can be easily pulverized by hand or using water.
  • the reactive component is at least one of an acrylic component, a molecule having one or more vinyl ether substituents, or a water miscible component that is, after curing, capable of swelling upon exposure to water or to an alkaline or acidic water solution.
  • the acrylic component is an acrylic monomer or an acrylic oligomer, and may be any one of the examples defined hereinabove.
  • acrylic components for use in the second interface material of the present invention are polyethylene glycol monoacrylate, marketed by Laporte under the trade name Bisomer PEA6, and polyethylene glycol diacrylate, marketed by Sartomer under the trade name SR-610, methoxypolyethyleneglycole 550 monomethacrylate, and the like.
  • the reactive component of the second interface material can also be a water miscible component that is, after curing, capable of swelling upon exposure to water or to an alkaline or acidic water solution.
  • water miscible components for the present invention are an acrylated urethane oligomer derivative of polyethylene glycol - polyethylene glycol urethane diacrylate, a partially acrylated polyol oligomer, an acrylated oligomer having hydrophillic substituents, or any combination thereof.
  • the hydrophilic substituents are acidic substituents, amino substituents, hydroxy substituents, or any combination thereof
  • An example of an acrylated monomer with hydrophillic substituents is betha-carboxyethyl acrylate, which contains acidic substituents
  • the reactive component of the second interface material can also be a molecule having one or more vinyl ether substituents, which may be any of the compounds as defined hereinabove.
  • An example of vinyl ether for the second interface material is 1,4-cyclohexane dimethanol divinyl ether, marketed by ISP under the trade name CHVE.
  • the reactive component of the second interface material is an acrylic oligomer. In another embodiment, the reactive component of the second interface material is a combination of an acrylic component as defined hereinabove and a water miscible component as defined hereinabove. In another embodiment, the reactive component of the present invention is a combination of an acrylic component as defined hereinabove and a molecule having one or more vinyl ether substituents, as defined hereinabove. In another embodiment, the reactive component of the present invention is a combination of a water miscible component as defined hereinabove, and a molecule having one or more vinyl ether substituents, as defined hereinabove. When the second interface material comprises a reactive material, the second interface material further comprises a photo-initiator. The photo-initiator can be any photo-initiator, as defined above.
  • Another characteristic of the solid support upon exposure to water or to an alkaline or acidic water solution may be the ability to break down during exposure to water or to an alkaline or acidic water solution. Because the second interface material is made of hydrophillic components, during the swelling process, internal forces appear and cause fractures and breakdown of the cured second interface material.
  • the second interface material may be at least partially water-soluble. At least part of the second interface material is completely water soluble/miscible During the removal of the support and/or release layers, the water soluble/miscible components are extracted out with water.
  • the second interface material liberates bubbles upon exposure to water or to an alkaline water or acidic water solution.
  • the bubbles are intended to help in the process of removal of the support and/or release layers from the construction layers.
  • the bubbles are liberated by a bubble releasing substance (BRS) that is present in the water solution that is used to clean out the 3-D object
  • a substance may be a carbonate or bicarbonate, for example sodium bicarbonate (SBC).
  • SBC sodium bicarbonate
  • the trigger for the production of CO2 may be the reaction of the SBC with an acid functionality present in the second interface material.
  • acid functionality may be introduced as part of the second interface material formulation or introduced later, after curing, using an acid water solution.
  • the first step may be to put the 3-D object with its support in a water solution containing a SBC, then to place the same object in an acidic solution The acid will start to decompose the SBC and product gas (bubbles).
  • the substance that liberates gas is already present in the formulation of the second interface material.
  • the second interface material may contain calcium bicarbonate as a solid pigment.
  • the trigger is the introduction of the second interface material in a water or acidic solution.
  • a BRS is not limited to a sodium bicarbonate or calcium bicarbonate and an acidic water solution. Other chemical reagents and reactions may be used to achieve the same result - the production of bubbles inside the matrix of the second interface material.
  • the SBC may be any alkaline metal or alkaline earth metal carbonate or bicarbonate Examples of preferred formulations of the second Interface material outside the scope of claim 1 are provided hereinbelow in Table 5 and Table 6, to which reference is now made. Tables 5 and 6 display various formulations that are suitable for use as the second interface material.
  • Table 5 Examples of Characteristic Formulation Components of Second Interface Material Trade Name Chemical Type Function in the formulation Supplier A SR-610 Polyethylene Glycole (600) Diacrylate Oligomer Sartomer B Bisomer PEA6 Polyethylene Glycole monoacrylate Water swelling/ sensitive Oligomer Laport C PEG 400 Polyethylene Glycole 400 Polymer (hydrophilic and palsticizer) Aldrich D Irgacure 907 alpha-Amino Ketone Free radical photo-initiator type I Ciba Specialties Chemical Inc.
  • the second interface material comprises: a water swelling oligomer, which can be any water swelling oligomer as defined hereinabove, and which is preferably polyethylene glycole monoacrylate; a non-reactive component, which can be any non-reactive component as defined hereinabove, and which is preferably polyethylene glycole; a radical photo-initiator, which can be any radical photo-initiator as defined hereinabove, and which is preferably alpha-amino ketone; a surface agent, which is preferably a silicone surface additive; and an inhibitor, which is preferably 4-methoxyphenol.
  • a water swelling oligomer which can be any water swelling oligomer as defined hereinabove, and which is preferably polyethylene glycole monoacrylate
  • a non-reactive component which can be any non-reactive component as defined hereinabove, and which is preferably polyethylene glycole
  • a radical photo-initiator which can be any radical photo-initiator as defined hereinabove, and
  • the second interface material comprises: a water swelling oligomer, which can be any water swelling oligomer as defined hereinabove, and which is preferably polyethylene glycole monoacrylate; a non-reactive component, which can be any non-reactive component as defined hereinabove, and which is preferably polyethylene glycole; a radical photo-initiator, which can be any radical photo-initiator as defined hereinabove, and which is preferably benzophenone; a co-initiator, which can be any co-initiator as defined hereinabove, and which is preferably triethanolamine; a surface agent, which is preferably a silicone surface additive; and an inhibitor, which is preferably 4-methoxyphenol.
  • a water swelling oligomer which can be any water swelling oligomer as defined hereinabove, and which is preferably polyethylene glycole monoacrylate
  • a non-reactive component which can be any non-reactive component as defined hereinabove, and which is preferably polyethylene glycole
  • the first interface material and the second interface material are suitable for use in the method for 3-D printing which is described in U.S. Patent 6,658,314 , assigned to the Assignees of the present application.
  • the method comprises: dispensing a first interface material from a printing head; dispensing a second interface material from said printing head; and combining the first interface material and the second interface material in pre-determined proportions to a produce a multiplicity of construction layers for forming the three-dimensional model.
  • the method further comprises the step of curing the first interface material.
  • the method may further comprise the step of curing the second interface material.
  • Curing may be carried out as described in U.S. Patent 6,658,314 .
  • the curing method is by radiation, such as Ultraviolet (UV) and/or Visible (Vis) and/or Infra Red (IR) and/or UV-Vis radiation.
  • UV-Vis radiation is preferred.
  • the first interface material and the second interface material are combined in predetermined proportions. For example, in order to obtain layers having a higher modulus of elasticity and a higher strength such as the construction layers, a suitable combination that contains mostly the first interface material is used. Further, in order to obtain layers having a lower modulus of elasticity arid a lower strength such as the release layers, a suitable combination that includes mostly the second interface material is used.
  • a combination that includes 90-100% of the first interface material and 0-10% of the second interface material is used.
  • a combination that includes 0-10% of the first interface material and 90-100% of the second interface material is used.
  • a combination that includes 30-70% of the first interface material and 70-30% of the second interface material is used.
  • a 3-D object which is comprised of a core consisting of a multiplicity of construction layers.
  • the construction layers are formed by combining predetermined proportions of the first interface material and the second interface material.
  • the 3-D object may further comprise a multiplicity of support layers for supporting the core.
  • the support layers are prepared by combining pre-determined proportions of the first interface material and the second interface material.
  • the support layers may be designed exactly like to construction layers, or may be designed to be weaker (lower modulus of elasticity) than the construction layers.
  • the 3-D object may further comprise a multiplicity of release layers for releasing the support layers from the construction layers.
  • the release layers are positioned between the support layers and the construction layers.
  • the release layers are prepared by combining pre-determined proportions of the first interface material and the second interface material.

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Claims (15)

  1. Zusammensetzung, die sich zur Unterstützung beim Bau eines dreidimensionalen Objekts durch ein Verfahren der selektiven Abgabe eignet, wobei die genannte Zusammensetzung folgendes umfasst:
    eine nicht-reaktionsfähige Komponente mit geringer Toxizität;
    eine reaktionsfähige Komponente;
    eine oberflächenaktive Substanz zum Reduzieren der Oberflächenspannung auf etwa 30 mN/m (30 Dyn/cm);
    eine Blasen freisetzende Substanz, die nachdem sie Wasser oder einer alkalischen oder acidischen Wasserlösung ausgesetzt worden ist, in der Lage ist, Gas zu erzeugen; und
    einen Stabilisator;
    wobei die genannte Zusammensetzung eine erste Viskosität von mehr als 80 mPa (cps) auf Umgebungstemperatur und eine zweite Viskosität von unter 20 mPa (cps) auf einer zweiten Temperatur aufweist, die höher ist als 60 °C, und wobei die genannte Zusammensetzung nach Bestrahlung in einer festen Substanz resultiert.
  2. Zusammensetzung nach Anspruch 1, wobei die genannte Blasen freisetzende Substanz Natriumbicarbonat oder Kalziumcarbonat ist.
  3. Zusammensetzung nach einem der vorstehenden Ansprüche, wobei die genannte nicht-reaktionsfähige Komponente Polyethylenglykol, Methoxypolyethylenglykol, Glycerol, Propylenglykol oder ein ethoxyliertes Polyol ist.
  4. Zusammensetzung nach einem der vorstehenden Ansprüche, wobei es sich bei der genannten reaktionsfähigen Komponente um ein acrylisches Monomer oder ein acrylisches Oligomer handelt.
  5. Zusammensetzung nach einem der Ansprüche 1 bis 3, wobei es sich bei der genannten reaktionsfähigen Komponente um Polyethylenglykolmonoacrylat, Polyethylenglykoldiacrylat oder Methoxypolyethylenglykol-550-Monomethacrylat handelt.
  6. Zusammensetzung nach einem der Ansprüche 1 bis 3, wobei es sich bei der genannten reaktionsfähigen Komponente um eine wassermischbar Komponente handelt, die nach dem Härten quellfähig ist, nachdem sie Wasser oder einer alkalischen oder acidischen Wasserlösung ausgesetzt worden ist.
  7. Zusammensetzung nach Anspruch 6, wobei es sich bei der wassermischbaren Komponente um ein acryliertes Urethanoligomerderivat von Polyethylenglykol-Polyethylenglykolurethandiacrylat ein teilweise acryliertes Polyololigomer, ein acryliertes Oligomer mit hydrophilen Substituenten oder eine Kombination dieser handelt.
  8. Zusammensetzung nach Anspruch 7, wobei die genannten hydrophilen Substituente acidische Substituente, Aminosubstituente, Hydroxysubstituente oder jede beliebige Kombination dieser umfassen.
  9. Zusammensetzung nach Anspruch 6, wobei es sich bei der wassermischbaren Komponente um Polyethylenglykolmonoacrylat handelt.
  10. Zusammensetzung nach einem der Ansprüche 1 bis 3, wobei es sich bei der genannten reaktionsfähigen Komponente um ein Molekül mit einem oder mehreren Vinylethersubstituenten handelt.
  11. Zusammensetzung nach einem der vorstehenden Ansprüche, wobei die aus der Bestrahlung resultierende Substanz nachdem sie Wasser oder einer alkalischen oder einer acidischen Wasserlösung ausgesetzt gewesen ist aufquillt, sich zersetzt oder sich auflöst.
  12. Zusammensetzung nach einem der Ansprüche 1 bis 10, wobei die aus der Bestrahlung resultierende Substanz als ein hydrophil gehärtetes Harz mit schwachen mechanischen Eigenschaften formuliert ist, das leicht per Hand oder unter Verwendung von Wasser pulverisiert werden kann.
  13. Zusammensetzung nach einem der Ansprüche 1 bis 3, wobei die reaktionsfähige Komponente Polyethylenglykolmonoacrylat ist, und wobei es sich bei der nichtreaktionsfähigen Komponente um Polyethylenglykol handelt.
  14. Zusammensetzung nach einem der vorstehenden Ansprüche zum Einsatz in einem dreidimensionalen Drucksystem, um eine Stützkonstruktion für ein dreidimensionales Objekt zu bauen.
  15. Feste Zusammensetzung, die durch Härten der Zusammensetzung nach einem der Ansprüche 1 bis 14 gebildet ist.
EP10181366.5A 2000-03-13 2001-03-13 Zusammensetzungen zur Verwendung beim dreidimensionalen Modelldruck Expired - Lifetime EP2298540B1 (de)

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